Ronette Lynn Peterson (July 14, 1963 - May 7, 1986) was a woman who went missing after visting her grandparents in Madrid, Iowa. She told them she was headed to Alabama with a male friend. Her body was found three months later floating in a water pit off Highway 33. She had been beaten, then put in the water to drown to death. She was identified via fingerprints in 2005.